Jason, who passed away suddenly last night aged 50, was appointed in 2016 and devoted himself to the club thereafter.
He was an outstanding CEO who was respected across football having also worked for Bath City, Newport County, Plymouth Argyle and Cardiff City.
A statement from his mother, Jen, and father, David, reads: “Words cannot describe our sadness following the loss of our beloved son, Jason.
“We know this feeling will be shared by all of his colleagues and his many, many friends.
“While we come to terms with this news, we ask for our family’s privacy to be respected.”
The club will be closed until Monday at the earliest. There will be no further comment at this time.